CN1055908C

CN1055908C - Coal ash thermal material products and its prodn. method

Info

Publication number: CN1055908C
Application number: CN96115529A
Authority: CN
Inventors: 孙绍奇; 刘玉祥; 吴德湖; 郝英甲; 罗海天
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-08-13
Filing date: 1996-08-13
Publication date: 2000-08-30
Anticipated expiration: 2016-08-13
Also published as: CN1173473A

Abstract

The present invention relates to a coal ash floater heat insulating material product for power plants, which is composed of a floater with the diameter of 0.125 to 0.106mm and adhesives made of phenolic resin and epoxy resin plus a phenolic resin solidifying agent or an epoxy resin solidifying agent. The coal ash floater heat insulating material product is prepared through the processes of floater selection, dewatering and drying, mixing and stirring, shaping by mould press or injection, demoulding and natural solidification. The present invention has the characteristics of light specific gravity, high temperature resistance, no flame on an open firing point, good heat preservation, no heat conduction, no water absorption, insulation, sound insulation, etc. The coal ash floater heat insulating material product can be widely used for oil-gas fields, oil pipelines, external heat insulating layers of warm supply pipelines. The coal ash floater heat insulating material product can also be used for the heat insulation of cold storages, underground buildings of grain storehouses and waterproof heat insulating layers of roofs.

Description

A kind ofly be applicable to the underground coal ash thermal material products of directly burying underground

The present invention utilizes the waste coal ash in fuel-burning power plant to float the lagging material goods that pearl is made, and it has insulation, fire prevention, waterproof, acid and alkali-resistance, protection against corrosion, sound insulation, heat insulation multiple function.

Before the present invention made, normally used lagging material mainly contained following three kinds: the one, and polyurethane rigid foam plastic, its advantage is that thermal conductivity is low, does not absorb water, good heat insulating, shortcoming are the low 150 ℃ of i.e. fusings of high temperature resistant coefficient, poor fire, do not prevent fires, the cost height, intensity is low; The 2nd, asbestos, its advantage is that resistance to elevated temperatures is good, shortcoming is the water-intake rate height, produces and use has public hazards, is unsuitable for undergroundly directly burying underground; The 3rd, perlite, its advantage is high temperature resistant, not heat conduction, shortcoming is the water-intake rate height, and goods are easily broken in the transportation installation process, and the production process power consumption is high.

The purpose of this invention is to provide a kind of good heat insulating, fire prevention, waterproof, acid and alkali-resistance, protection against corrosion, sound insulation, heat insulation, ultimate compression strength is big, folding strength is big, is applicable to underground coal ash thermal material products of directly burying underground and method for making.

Main raw material of the present invention is that the floating matter that utilizes the waste flyash in fuel-burning power plant to extract with wet cleaning process is commonly called as and floats pearl, it is a kind of spheroid, hollow seamless grey small-particle, diameter is that 0.125～0.106mm (120～140 order) is fuel-burning power plant coal dust product behind 1800 ℃ of high-temp combustions in stove, has light specific gravity, floats on water, high temperature resistant 800～1200 ℃, open firing point not, good heat insulating, not heat conduction, the desirable insulated fire water-proof material that does not absorb water.

Coal ash thermal material products of the present invention floats pearl by coal ash and binding agent is formed, and its proportioning is:

It is 0.125～0.106mm (120～140 order), 70～85% (weight percents) that coal ash floats the pearl diameter, binding agent 10～30%, and binding agent adds phenolic resin curative by resol and Resins, epoxy or epoxy curing agent is made, and its proportioning is:

Resol adds Resins, epoxy or wherein a kind ofly accounts for a little 80～85%, and phenolic resin curative or epoxy curing agent account for 15～20%.

The concrete technical process of this insulation tree material products method for making is:

1. coal ash floats the selection of pearl: pour fly ash in electric power plant into will keep afloat with flotation process in the water the pearl that floats and pull out, remove impurity;

2. dehydrate: that will pull out floats pearl through seasoning or Tumble Dry;

3. mix and mix: this is floated pearl drop in the stirrer, add binding agent again and stir at normal temperatures, float the compound that bead surface scribbles adhensive membrane,

4. mold pressing or extruding: coat releasing agent at die surface earlier, paraffin, organosilicon or spread plastics film drop into compound in different size and the different moulds pressurization or extrusion molding;

5. the demoulding: after the moulding, seasoning 15～20 minutes can the demoulding or is heated 80～150 ℃ of demouldings after 5～10 minutes;

6. spontaneous curing: seasoning is 24 hours after the demoulding, the finished product of these goods.

These lagging material goods its advantage compared with the prior art are: 1. high temperature resistant 500～700 ℃, open firing point is not; 2. water-intake rate 2～5%; 3. ultimate compression strength 4.85Mpa (Kg/cm ²); 4. folding strength 2.61MPa (Kg/cm ²); It also has insulation, and sound insulation is heat insulation, acid and alkali-resistance, superperformances such as protection against corrosion; Because manufacture craft, equipment are simple, but can make at site operation, once shaped, the loss that minimizing causes in transportation, installation process breakage, it can be widely used in the external thermal insulation of making oil-gas field pipeline, oil pipeline, hot duct, can directly be embedded in underground, also can make the storage tanker external thermal insulation, freezer is heat insulation, the silo bottom of the reservior, buildings underground waterproof layer, building roof water-proof thermal insulation layer etc.It is that the thermal power generation waste fully is used that raw material coal ash of the present invention floats pearl, turns waste into wealth, and reduces environmental pollution, increases environmental benefit.

Embodiment one

The oil-gas field pipeline, the once shaped of oil pipeline external thermal insulation is made

Get the coal ash of choosing and float pearl 700Kg, the resol 225Kg of binding agent, resol solid formulation 45Kg; Earlier resol is dropped into and add phenolic resin curative in the stirrer and stir and make binding agent; Coal ash is floated pearl drop in another stirrer, add binding agent again and under temperature is normal, be stirred into compound, use spiral shell family pump then compound form once on pipeline.

Embodiment two

The making of oil field oil depot storage tanker arc warming plate:

Get the coal ash of choosing and float pearl 750Kg, the resol 112.5Kg of binding agent, Resins, epoxy 100Kg, epoxy curing agent 37.5Kg drops into resol and Resins, epoxy in the stirrer earlier, and the adding epoxy curing agent stirs and makes binding agent; In addition coal ash being floated pearl drops in another stirrer, adding above-mentioned binding agent stirs and makes compound, then compound is dropped into and use the oil press extrusion forming in the arc mould, seasoning is 24 hours after the demoulding, make arc warming plate finished product after the curing, at last this arc warming plate is sticked on the store oil tank wall with synthetical glue.

Claims

1. one kind is applicable to the underground coal ash thermal material products of directly burying underground, it is characterized in that it floats pearl by coal ash and binding agent is formed, and its proportioning is by weight percentage:

Diameter is that 0.125～0.106 millimeter coal ash floats pearl 72～75%;

Binding agent 25～28%;

Described binding agent adds phenolic resin curative by resol and Resins, epoxy or epoxy curing agent is formed, and its proportioning is by weight percentage:

Resol adds Resins, epoxy or wherein a kind of 80-85% of accounting for;

Phenolic resin curative or epoxy curing agent account for 15-20%.

2. the described preparation method who is applicable to the underground coal ash thermal material products of directly burying underground of claim 1 comprises the steps:

(1) coal ash floats the selection of pearl: fly ash in electric power plant is poured in the water, pulled out and remove impurity with the pearl that floats that wet cleaning process will be kept afloat;

(2) dehydrate: that will pull out floats pearl through seasoning or Tumble Dry;

(3) mix stirring: float in the pearl input stirrer with described, add binding agent, stir at normal temperatures, make and float bead surface and scribble adhensive membrane, the wherein said consumption that floats pearl accounts for the 72-75% of goods gross weight, and the binding agent consumption accounts for the 25-28% of goods gross weight, wherein, binding agent adds phenolic resin curative by resol and Resins, epoxy or epoxy curing agent is formed, and its proportioning is by weight percentage: resol adds Resins, epoxy or wherein a kind of 80-85% of accounting for; Phenolic resin curative or epoxy curing agent account for 15-20%;

(4) mold pressing or extruding:; Earlier coat releasing agent at die surface, paraffin or organosilicon or spread plastics film drop into pressurization or extrusion molding in the different moulds of different size with above-mentioned compound;

(5) demoulding: after the moulding seasoning 15-20 minute or the heating 80-150 ℃, the demoulding after 5-10 minute;

(6) spontaneous curing: after the demoulding spontaneous curing 24 hours this goods finished product.